Coal-jigging plant.



C. SIMON.

E COAL JIGGING PLANT.

APPLICATION FILED APR. 11. 1914. RENEWED MAY 21,1915.

'Patentfidlune 29, 1915.

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, oblong meshes, so called kiln sieves.

pnrran snares arau r orrrn CHRISTIAN SIMON, 0F ESSEN-EUHR, GERMANY.

coAL-neeme PLANT.

Specification of Letters. Patent- Patented June 29, 3915.

Application filed April 17, 1914, Serial No. 832,627. Renewed May 21, 1915. SeriatNo. 29,662.

To all whom it may concern:

. Be it known that I, CHRISTIAN SIMON, engineer, a subject of the German Emperor, residing at Essen-Ruhr, Germany, have invented certain new and useful Improvements in Coal-Jigging Plants, of which the following is a specification.

The purpose of this invention is-to improve the results of dressing of coals, simplify the management of the jiggers and the attendance to the plant by advantageously combining several well known arrange ments.

In coal jiggers discharging devices have proved to be of advantage, in which theissuing rubbles accumulate first in a compartment formed by a partition Wall and the discharging slide, by this arrangement the equilibrium is kept between the rubbles and the coals on the stone-bed. The drawback of this arrangement however is, that the heavier rubbles accumulating in the aforesaid transmission compartment hinder the issue of the lighter ones, especially of the thin fiat pieces of bituminous slate, which collect on the bed and pass out with the coal. It has been tried by means of a feldspar-bed and other devices to eliminate first the heavier rubbles, but the draw back of this arrangement is that it is necessary to charge the plant very carefully, and insuch a way, that the equilibrium between the separate compartments is always preserved. This has proved to be a disadvantage, the workmen not being always intelligent enough to charge the plant as it ought to be charged, in which case the feldspar lumps are washed from one compartment into the other. It is a universally acknowledged fact that those devices are not to be depended on, and that they really are almost useless for practical purposes. J iggers of this system have been greatly improved by a special discharging device, by which the heavier rubbles are eliminated first. In order to prevent the bituminous slate accumulating on the bed,

and to facilitate its issue through the discharging device, the material coming from the machine for the preliminary washing is classified once more by water on sieves wigh y treating the coal in this way it is possible for the flat pieces of bituminous slate to pass on to the smaller rubbles, and from there they are eliminated verj, easily by the discharging device. It has been found out, that in this kind of discharging deyices (which upper part becoming more effective by this arrangement.

In the plants hitherto used it was necessary to let a part of the coals pass with the rubbles, to be able to wash out the bituminous slate. Bya combination of several well (2) The control of the issue of the rubbles is effected almost automatically, and the workmen have to answer for any loss of coals, as it is only caused by utter carelessness. 7 (3) Although the results of jigging are much improved the working of the whole plant does not depend so much on the intelligence of the workmen attending to it, as the working of the plants, which have been in use until now, did.

The inclosed drawing shows how the plants are constructed.

Figure 1 is a cross section of the coal jigger with the discharging device. It also shows the room, where the rubbles collect first a, the slanting walls w. and the sieves for the classifying s. Fig. 2 is a longitudinal sectionof the jigger with the the coals, which now only contain the light rubbles are graded once more on the sieves 8, represented by Fig. 1. These sieves have oblong meshes. It is advisable to use kiln sieves for this purpose. The light flat rubbles go then to the smaller material, and are easily eliminated there. Theclassifying is completed on the principal jiggers. Bythis mode of preliminary preparing the material, it is much easier to work it up on, the principal jig-ge'rs, because the heavy rubbles, which are eliminated first, cannot disturb now the issue of the light ones in the compartments a of the discharging device. Plants constructed in this manner are more reliable than those, in which the discharging devices for the heavy rubbles are united in the same machine. The sloping walls, which are also shown in the drawing are arranged at'the spots, where the material leaves the machines. By this arrangement the effect of the working of the plant is also improved.

The advantage of the pipe r is, that the water leaving by it can be used again in the principal iggers, and that no special elevator is necessary for eliminating the heavy rubbles.

I claim:

1. In combination a jig, a hydraulic classifier above the level of the jig, discharge means for the lighter material from the hydraulic classifier leading to and discharging upon the jig screen, a closed discharge conduit for the heavier material leading from the bottom of the hydraulic classifier to and discharging" into the hutch of the jig, said jig being provided with an automatic overflow chamber for the heavier material.

2. In combination a sectional jig, a hydraulic classifier above the level of the jig,

discharge means for the heavier -material leading from the bottom of .the hydraulic classifier to the hutch of the jig,,said discharge means forming a closed conduit, a

conduit for the lighter material from the V CHRISTIAN SIMON. [L. s.]

' Witnesses:

HELEN NUFER' FRANCES NUFER. 

